The mass of 1 mole of neutrons `(m_(n) = 1.675 xx 10^(-27)` kg) is:

Calculate the mass of 1 mole of neutron in kg (n_(m) = 1.675 xx 10^(27) kg)

Calculate the velocity of a neutron having de Broglie wavelength of 10 fermi. Mass of neutron, m_(n) = 1.7 xx 10^(-27)kg . Neglect the relative effects.

There is a stream of neutrons with a kinetic energy of 0.0327eV. If the half-life of neutrons is 700 seconds, the fraction of neutrons that will decay before they travel a distance of 10 Km . (Given mass of neutron m=1.6758 xx 10^(-27) kg )

(i) Calculate the total number of electrons present in one mole of methane. (ii) Find (a) the total number and (b) the total mass of neutrons in 7 mg " of " ""^(14)C . (Assume that mass of a neutron = 1.675 xx 10^(-27) kg) . (iii) Find (a) the total number and (b) the total mass of protons in 34 kg of NH_3 at STP. Will the answer change if the temperature and pressure are changed?

There is a stream of neutrons with a kinetic energy of 0.0327 eV . If the half-life of neutrons is 700 s , what fraction of neutrons will decay before they travel is distance of 10 m ? Given mass of neutron = 1.676 xx 10^(-27) kg .